feat(ui): implement edge-to-edge support and improve splash transition

- Enable edge-to-edge display in `MainActivity` and handle window insets in `PlayerFragment`.
- Add a fade-out animation when hiding the loading overlay.
- Sync player state with the controller during setup and reset playing state in preferences on service destruction.
- Simplify splash screen drawable and update background color attributes in layout.
- Remove manual navigation bar color overrides.

app/src/main/java/com/michatec/radio/MainActivity.kt

@@ -6,8 +6,10 @@ import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
 import android.view.View
+import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
+import androidx.core.view.isVisible
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.NavigationUI
@@ -28,6 +30,7 @@ class MainActivity : AppCompatActivity() {
 
     /* Overrides onCreate from AppCompatActivity */
     override fun onCreate(savedInstanceState: Bundle?) {
+        enableEdgeToEdge()
         setTheme(R.style.AppTheme)
         super.onCreate(savedInstanceState)
         
@@ -49,19 +52,31 @@ class MainActivity : AppCompatActivity() {
         NavigationUI.setupWithNavController(toolbar, navController, appBarConfiguration)
         supportActionBar?.hide()
 
-        // TV-specific loading logic
+        // TV-specific loading logic: Hide the overlay once the app is ready
         if (packageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
             Handler(Looper.getMainLooper()).postDelayed({
-                findViewById<View>(R.id.loading_layout)?.visibility = View.GONE
-            }, 1500)
+                hideLoadingOverlay()
+            }, 1200)
         } else {
-            findViewById<View>(R.id.loading_layout)?.visibility = View.GONE
+            hideLoadingOverlay()
         }
 
         // register listener for changes in shared preferences
         PreferencesHelper.registerPreferenceChangeListener(sharedPreferenceChangeListener)
     }
 
+    /* Hides the loading/splash overlay */
+    private fun hideLoadingOverlay() {
+        findViewById<View>(R.id.loading_layout)?.let { overlay ->
+            if (overlay.isVisible) {
+                overlay.animate()
+                    .alpha(0f)
+                    .setDuration(500)
+                    .withEndAction { overlay.visibility = View.GONE }
+            }
+        }
+    }
+
 
     /* Overrides onResume from AppCompatActivity */
     override fun onResume() {
@@ -75,7 +90,6 @@ class MainActivity : AppCompatActivity() {
 
     /* Overrides onSupportNavigateUp from AppCompatActivity */
     override fun onSupportNavigateUp(): Boolean {
-        // Taken from: https://developer.android.com/guide/navigation/navigation-ui#action_bar
         val navHostFragment = supportFragmentManager.findFragmentById(R.id.main_host_container) as NavHostFragment
         val navController = navHostFragment.navController
         return navController.navigateUp(appBarConfiguration) || super.onSupportNavigateUp()

app/src/main/java/com/michatec/radio/PlayerFragment.kt

@@ -22,6 +22,9 @@ import androidx.annotation.OptIn
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.net.toUri
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.updatePadding
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.ViewModelProvider
 import androidx.media3.common.MediaItem
@@ -167,8 +170,11 @@ class PlayerFragment : Fragment(),
         // hide action bar
         (activity as AppCompatActivity).supportActionBar?.hide()
 
-        // set the same background color of the player sheet for the navigation bar
-        requireActivity().window.navigationBarColor = ContextCompat.getColor(requireActivity(), R.color.player_sheet_background)
+        ViewCompat.setOnApplyWindowInsetsListener(layout.rootView) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.updatePadding(bottom = systemBars.bottom)
+            insets
+        }
         // associate the ItemTouchHelper with the RecyclerView
         itemTouchHelper = ItemTouchHelper(ItemTouchHelperCallback())
         itemTouchHelper?.attachToRecyclerView(layout.recyclerView)
@@ -405,6 +411,13 @@ class PlayerFragment : Fragment(),
     private fun setupController() {
         val controller: MediaController = this.controller ?: return
         controller.addListener(playerListener)
+
+        // Sync local playerState with actual controller state
+        if (playerState.isPlaying != controller.isPlaying) {
+            playerState.isPlaying = controller.isPlaying
+            updatePlayerViews()
+        }
+
         requestMetadataUpdate()
         // handle start intent
         handleStartIntent()

app/src/main/java/com/michatec/radio/PlayerService.kt

@@ -81,7 +81,8 @@ class PlayerService : MediaLibraryService() {
 
     /* Overrides onDestroy from Service */
     override fun onDestroy() {
-        // player.removeAnalyticsListener(analyticsListener)
+        // Reset playing state in preferences
+        PreferencesHelper.saveIsPlaying(false)
         player.removeListener(playerListener)
         player.release()
         mediaLibrarySession.release()

app/src/main/java/com/michatec/radio/SettingsFragment.kt

@@ -21,7 +21,6 @@ import com.michatec.radio.dialogs.ErrorDialog
 import com.michatec.radio.dialogs.ThemeSelectionDialog
 import com.michatec.radio.dialogs.YesNoDialog
 import com.michatec.radio.helpers.*
-import com.michatec.radio.helpers.AppThemeHelper.getColor
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.launch
@@ -46,7 +45,6 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         (activity as AppCompatActivity).supportActionBar?.show()
         (activity as AppCompatActivity).supportActionBar?.setDisplayHomeAsUpEnabled(true)
         (activity as AppCompatActivity).supportActionBar?.title = getString(R.string.fragment_settings_title)
-        requireActivity().window.navigationBarColor = getColor(requireContext(), android.R.attr.colorBackground)
     }
 
     /* Overrides onCreatePreferences from PreferenceFragmentCompat */